Now showing items 1-10 of 1854
Quantifying resonant and near-resonant interactions in rotating turbulence
(Cambridge University Press, 2016-11)
Nonlinear triadic interactions are at the heart of our understanding of turbulence. In flows where waves are present, modes must not only be in a triad to interact, but their frequencies must also satisfy an extra condition: ...
Temporal correlations imaging fixed targets through turbulence
(Optical Society of America, 2016-06)
We study the temporal correlations from dynamic imaging through turbulence using incoherent light from fixed highcontrast targets. We conduct our experiment in controlled laboratory conditions using several values of the ...
Intermittency in the isotropic component of helical and nonhelical turbulent flows
(American Physical Society, 2010-01)
We analyze the isotropic component of turbulent flows spanning a broad range or Reynolds numbers. The aim is to identify scaling laws and their Reynolds number dependence in flows under different mechanical forcings. To ...
SYNCHRONIZATION OF CHAOS AND THE TRANSITION TO WAVE TURBULENCE
(WORLD SCIENTIFIC PUBL CO PTE LTDSINGAPORE, 2012)
We investigated the transition to wave turbulence in a spatially extended three-wave interacting model, where a spatially homogeneous state undergoing chaotic dynamics undergoes spatial mode excitation. The transition to ...
Estimation of C2n based on scintillation of fixed targets imaged through atmospheric turbulence
(Optical Society Of America, 2015-12)
We define a pixel-based scintillation index for dynamic incoherent imaging of fixed high-contrast targets through atmospheric turbulence. We propose a simple setup to study this parameter varying the C2n constant in ...
Isotropization at small scales of rotating helically driven turbulence
(Cambridge University Press, 2012-04)
We present numerical evidence of how three-dimensionalization occurs at small scale in rotating turbulence with Beltrami (ABC) forcing, creating helical flow. The Zeman scale ℓ Ω at which the inertial and eddy turn-over ...
Formation of granular structures in trapped Bose-Einstein condensates under oscillatory excitations
(Institute of Physics - IOPBristol, 2014-07)
We present experimental observations and numerical simulations of nonequilibrium spatial structures in a trapped Bose-Einstein condensate subject to oscillatory perturbations. In experiment, first, there appear collective ...
Libro del mes: Alan Greenspan. Age of turbulence
(Revista Mensaje, 2018)
STUDY OF THE EQUATORIAL ATLANTIC OCEAN MIXING LAYER USING A ONE-DIMENSIONAL TURBULENCE MODEL
(INST OCEANOGRAFICO, UNIV SAO PAULO, 2010)
The General Ocean Turbulence Model (GOTM) is applied to the diagnostic turbulence field of the mixing layer (ML) over the equatorial region of the Atlantic Ocean. Two situations were investigated: rainy and dry seasons, ...
Characterizing inertial and convective optical turbulence by detrended fluctuation analysis
Atmospheric turbulence is usually simulated at the laboratory by generating convective free flows with hot surfaces, or heaters. It is tacitly assumed that propagation experiments in this environment are comparable to those ...